桥梁板式橡胶支座与粘滞阻尼器组合使用的减震性能研究

在分析几种减隔震装置的减震耗能机理的基础上．提出了粘滞阻尼器与板式橡胶支座组合使用的减震措施，并利用非线性时程地震反应分析方法。对这种组合装置的减震性能进行了研究。为了研究阻尼系数、阻尼指数和周期对减隔震桥梁地震反应的影响。本文做了大量的参数分析。研究结果表明．组合使用板式橡胶支座和粘滞阻尼器，既能显著地减小结构地震力。又能有效地控制梁体位移及墩、梁相对位移。

A Study on Aseismic Performance of Combination of Laminated Rubber Bearing and Viscous Damper for Bridges

The aseismic performance of the combination of laminated rubber bearing and viscous damper for bridges is studied with a nonlinear time history analysis method in this paper This kind of composite device is brought forward on the basis of aseismic principles of base isolation, such as flexibility and energy dissipation A large number of parameter analyses are carried out in order to investigate the effects of damping coefficient, damping exponent and period on the seismic response of structures. Analysis results demonstrate that the composite device not only reduces seismic forces, but also controls displacements of deck or relative displacements between superstructure and piers